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Fiber is All-Natural Goodness

SORT OF: Fiber is showing up in everything these days—yogurt, grape juice, artificial sweetener. If this seems impossible, remember that these are molecules; you don't have to see or feel fiber for it to be present. Scientists now have a new class of fiber they refer to as "functional" fiber, meaning it's created and added to processed foods. "You can make fiber from bacteria or from yeast," says Slavin. "And as long as you prove that it can lower cholesterol or feed the good bacteria in your gut or increase stool weight, it's fiber."